E-1 Thermal Shock Failure in Tungsten-10%Rhenium by Laser Irradiation Method(Session: Thermal Fatique/Creep)

2006 ◽  
Vol 2006 (0) ◽  
pp. 93
Author(s):  
Supamard Sujatanond ◽  
Zhi-Jun Dai ◽  
Yoshiharu Mutoh ◽  
Supachai Surapunt
Keyword(s):  
Thermal Shock ◽  
Laser Irradiation

Evaluation of Thermal Shock Fracture Toughness for ATJ Graphite Using Laser Irradiation Method

2004 ◽  
Vol 261-263 ◽  
pp. 93-98 ◽  
Author(s):  
Jae Hoon Kim ◽  
Young Shin Lee ◽  
Duck Hoi Kim ◽  
N.S. Park ◽  
Soon Il Moon
Keyword(s):  
Fracture Toughness ◽  
Temperature Distribution ◽  
Thermal Shock ◽  
Laser Irradiation ◽  
Laser Power ◽  
Laser Source ◽  
Surface Phenomenon ◽  
Heat Resistant ◽  
The Common ◽  
Fracture Toughness Specimen

Graphite has been developed as heat resistant material. To apply a reliable structural design using graphite, it is very important to investigate thermal shock characteristics. The common experimental methods of thermal shock fracture toughness are quenching and arc discharging heating methods. This paper describes experimental technique to evaluate the thermal shock fracture toughness using laser irradiation and proposes that a critical value of laser power can be a measurement to evaluate heat resistant materials. The laser source is CO2 laser having maximum power of 4.0kW. The range of laser beam is from 1.0 to 2.7 kW and the beam duration is fixed at 1sec. K and C type thermocouples were used to measure the temperature distribution of a thermal shock fracture toughness specimen. In this study, the temperature distribution of specimen surfaces and critical laser power was investigated. After test, the surface phenomenon of specimen is examined using radiography and SEM. It is concluded that the critical laser power causing fracture can be the major factor of thermal shock fracture toughness of ATJ graphite.

Strength Properties with Laser Irradiation in Low Fusion Porcelain and Thermal Shock

2004 ◽  
Vol 2004.1 (0) ◽  
pp. 287-288
Author(s):  
Manabu KAWANABE ◽  
Toshio Sato ◽  
Toshimitu HIRAI ◽  
Kiichi Tsuji ◽  
Norimichi Kawashima ◽  
...  
Keyword(s):  
Thermal Shock ◽  
Laser Irradiation ◽  
Strength Properties

Thermal shock resistance of carbon–carbon (C/C) composite by laser irradiation technique

1999 ◽  
Vol 25 (1) ◽  
pp. 61-67 ◽  
Author(s):  
Shigeyasu Amada ◽  
Wu Yi Nong ◽  
Qi Zhu Min ◽  
Shigeru Akiyama
Keyword(s):  
Thermal Shock ◽  
Laser Irradiation ◽  
Thermal Shock Resistance ◽  
Shock Resistance
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